* {
    margin: 0;
    padding: 0;
}

#mama {
    height: 100vh;
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
}

#container {
    position: relative;
}

#container button {
    position: absolute;
    top: 30px;
    left: 30px;
    padding: 5px;
    border-radius: 5px;
    background: pink;
    outline: none;
    border: none;
    cursor: pointer;
}

#container .btn2 {
    left: 100px;
}

#container .btn3 {
    left: 200px;
}

#mama span {
    width: 20px;
    background: green;
}